Hole Processing Spindle Control Using Cutting Resistance Feedback
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Solution Overview
Problem
Conventional handheld tool driving devices for hole processing require users to manually determine and adjust the rotating speed and feeding speed of tools based on tool diameter and workpiece material, which can be challenging, especially when processing materials with varying thicknesses, leading to suboptimal hole processing conditions.
Innovation Solution
A tool driving device equipped with a spindle, electric motor, guide, actuator, sensor, and controller that measures cutting resistance to automatically adjust the rotating speed and feeding speed of the tool, allowing for more precise and user-friendly hole processing across different materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a user manually determines rotating speed and feeding speed based on tool diameter and workpiece material, then the device structure remains simple, but the hole processing quality deteriorates when processing materials with varying thicknesses
Solution Approach 1:
The patent employs a sensor to detect cutting resistance in real-time during hole processing and feeds this information back to the controller. The controller automatically adjusts rotating speed and feeding speed based on the detected cutting resistance, ensuring optimal processing quality without requiring complex manual pre-setting for each material condition
Solution Approach 2:
The system performs self-adjustment of processing parameters by automatically controlling the rotating speed and feeding speed based on real-time cutting resistance detection. This eliminates the need for users to manually determine and adjust parameters for different material conditions, making the device serve itself in optimizing processing quality
2Manufacturing precision
If the user is required to determine appropriate rotating speeds and feeding speeds in advance for each material, then the processing conditions can be optimized, but the ease of operation deteriorates
Solution Approach 1:
The system automatically determines and adjusts processing parameters based on real-time cutting resistance detection. The sensor and controller work together to perform self-service in optimizing processing conditions, completely relieving the user of the burden of determining appropriate rotating speeds and feeding speeds in advance for different materials
Solution Approach 2:
The real-time feedback mechanism allows the system to automatically adapt processing conditions during operation based on actual cutting resistance. This eliminates the need for users to pre-determine parameters for each material, significantly improving ease of operation while maintaining optimized processing conditions
3Adaptability or versatility
If the rotating speed and feeding speed are controlled independently with two motors, then the control flexibility improves, but the device complexity increases
Solution Approach 1:
The patent uses cutting resistance feedback to automatically coordinate the control of rotating speed and feeding speed. This feedback mechanism provides the necessary control flexibility to handle different material conditions while avoiding the need for complex independent dual-motor control systems, as the feedback-driven coordination simplifies the control architecture
Data Source
AI summary
A tool driving device for hole processing includes a spindle, an electric motor, a guide, an electric actuator, a sensor and a controller. The spindle has a holder for holding a tool for the hole processing. The holder is disposed at a distal portion of the spindle. The electric motor rotates the spindle. The guide has a positioning member for positioning the tool driving device to the workpiece. The electric actuator advances and retreats the spindle relatively to the guide in a rotation axis direction of the spindle. The sensor measures cutting resistance transmitted from the tool to the spindle. The controller is configured to control the electric motor and the electric actuator based on the cutting resistance measured by the sensor so that a rotating speed and a feeding speed of the spindle become a rotating speed and a feeding speed according to the cutting resistance.